CN110855783B - Smart city data system based on big data - Google Patents
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- CN110855783B CN110855783B CN201911115138.5A CN201911115138A CN110855783B CN 110855783 B CN110855783 B CN 110855783B CN 201911115138 A CN201911115138 A CN 201911115138A CN 110855783 B CN110855783 B CN 110855783B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- G—PHYSICS
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/10—Services
- G06Q50/26—Government or public services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/52—Network services specially adapted for the location of the user terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/562—Brokering proxy services
Abstract
The invention relates to a big data-based smart city data system which comprises a cloud data service platform and a smart city subsystem, wherein the cloud data service platform and the smart city subsystem are in communication connection, the smart city subsystem comprises an Internet of things device and an Internet of things data platform, the Internet of things data platform comprises a data processing module and a data agent module, and a gateway of the Internet of things data platform and the Internet of things device are provided with an out-of-band communication system. And the data intermediary server in the cloud data service platform divides the smart city subsystem into a data production party and a data application party according to the received data service request. The data intermediate server receives the metadata of the available data stream sent by the data producer and the data demand information sent by the data application party, and then pairs the data application party with the data producer. The data mediation server generates a producer configuration and an application configuration. The data application side assembles the data fields of the received multiple data streams into a single target data stream for the specified smart city application.
Description
The invention relates to divisional application with an original application number of 201810911222.7, an original application date of 2018, 08 and 11 months and an original invention name of a smart city data sharing system.
Technical Field
The invention relates to the field of big data and smart city data processing, in particular to a smart city data system based on big data.
Background
The smart city is a product combining the Internet of things and the digital city, intelligent analysis and intelligent service are provided on the basis of city big data, the collection, storage and analysis processing technology of a large amount of data of the smart city is researched, and the method has important significance for data mining and intelligent decision making of the smart city. At present, urban data are mostly distributed in an informatization system dispersedly established by each department, and are summarized to a data center to realize comprehensive analysis service after data are extracted, but the summarized and integrated data frequently have the problems of difficult matching, inconsistency, information redundancy and the like, and are difficult to effectively assist the multidimensional decision analysis of the smart city, so that a data system which is highly shared, subject-oriented, convenient to apply and flexibly expanded is established from the perspective of global management and application of the urban data, and the key for improving the operating efficiency of the smart city is provided.
If various data collected in each department in the smart city only flow in a single system, the value of the data only plays a role of 10 percent. Smart city data can only maximize value by moving within a system to being shared by as many systems as possible, breaking the boundaries of a single system. The internet of things produces a large amount of data that is useful not only to organizations that own or operate the internet of things devices that generate the data, but also to other organizations. For example, people flow and vehicle flow data detected by internet of things sensors of smart lighting systems are also useful for intelligent transportation systems and security systems. Therefore, data needs to be shared between organizations in a timely manner. The data sharing scheme of the existing smart city system is as follows: the sub-organizations of each smart city system transmit the data collected by the Internet of things equipment to the cloud data center, and then each sub-organization requests the data collected by other organizations from the cloud data center, so that specific intelligent application of each sub-organization is supported. Data usage organizations need to combine data streams of multiple data generation organizations, yet only use partial data in a single data stream, thus requiring a significant amount of manpower to filter and aggregate data across data streams. Therefore, the prior art solution causes bandwidth waste and also requires very high labor cost.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a smart city data sharing system which comprises a cloud data service platform and a smart city subsystem, wherein the cloud data service platform is in communication connection with the smart city subsystem, the smart city subsystem comprises a smart traffic system, a smart lighting system, a smart security system and a smart environment monitoring system, the smart city subsystem comprises an internet of things device and an internet of things data platform, the internet of things data platform comprises a data processing module and a data agent module,
the data intermediary server in the cloud data service platform divides the related smart city subsystems into a data production party and a data application party according to the received data service request,
the data mediation server receives metadata of available data streams sent by a data producer and data requirement information sent by a data applicator, and then pairs the data applicator with the data producer satisfying its requirements, the data requirement information including a selection of individual data fields associated with a plurality of data streams,
the data intermediary server generates a producer configuration and an application configuration and transmits the producer configuration and the application configuration to the corresponding Internet of things data platform; based on the identified pairing, the data producer and the data application party establish peer-to-peer connection, so that real-time data sharing between the smart city subsystems is realized, and the method comprises the following steps:
the data mediation server responds to a data request of the data application party and enables the corresponding data production party to selectively send the data fields to the data application party according to the data demand information of the data application party, and the data application party assembles the data fields of the data streams received from the plurality of data production parties into a single target data stream for the specified smart city application.
According to a preferred embodiment, the applications of the intelligent traffic system comprise real-time traffic data distribution and road traffic guidance, the applications of the intelligent lighting system comprise energy-saving management and lamp networking positioning, the applications of the intelligent security system comprise remote monitoring and security information distribution, and the applications of the intelligent environment monitoring system comprise pollutant monitoring and environment information distribution.
According to a preferred embodiment, the metadata of the available data streams comprises: the data type, the data rate and the information of the collected data of the Internet of things equipment, wherein the information of the Internet of things equipment comprises the geographic position, the manufacturer, the model, the serial number and the measurement precision;
the data requirement information further comprises: data type, data rate, and geographic location information and time information when the data was collected.
According to a preferred embodiment, the producer configuration is generated by the data mediation server and sent to a data producer associated with the single data service, the producer configuration identifying the data application and specifying selected data fields of a data stream provided by the data producer;
the application-side configuration is generated by the data mediation server and sent to a data application side associated with the single data service, the application-side configuration identifying a data producer that streams data to the data application side and specifying a mapping policy when mapping the streamed data to a single target data stream.
According to a preferred embodiment, the data intermediary server generates a security token and sends the security token and the network address of the data application party to the data production party, and a data proxy module in the data production party establishes a peer-to-peer connection with the data application party according to the security token and the network address.
According to a preferred embodiment, after establishing peer-to-peer connection, the data producer filters the original data stream according to the producer configuration and sends the data field selected in the data demand information to the data application party;
the data application side receives data streams from the data production side, and then combines the received data streams into a single target data stream through the data agent module.
According to a preferred embodiment, the data mediation server includes a communication module, a user interface module, a configuration creator, a supply and demand information base, and an industry profile base, wherein,
the supply and demand information base is used for storing metadata of available data streams and metadata of data streams required by each smart city subsystem,
the industry profile library is used for storing identification information of each smart city subsystem,
the configuration creator is used for generating a producer side configuration and an application side configuration.
According to a preferred embodiment, the data agent module in the data platform of the internet of things comprises a data filtering unit, a data field mapping unit, a data formatting unit and a communication unit.
The invention has the following beneficial effects:
and the data intermediary server in the cloud data service platform divides the related smart city subsystem into a data production party and a data application party according to the received data service request. The data intermediate server generates a producer configuration and an application configuration according to the received metadata of the available data stream sent by the data producer and the data demand information sent by the data application side, and transmits the producer configuration and the application configuration to the corresponding data platform of the Internet of things; based on the identified pairing, the data producer and the data application party establish peer-to-peer connection, and therefore real-time data sharing among the smart city subsystems is achieved. Therefore, the invention can carry out real-time data sharing on the data of the Internet of things generated in the smart city subsystems belonging to different department organizations according to the application requirements of the smart city. Because the data real-time sharing is realized by directly establishing peer-to-peer connection among different intelligent city subsystems to selectively transmit data streams, compared with the traditional data sharing scheme, the data real-time sharing method has the advantages that the bandwidth is effectively saved, and the response speed is higher.
In addition, the data application party can assemble the data fields of the multiple data streams received from the multiple data production parties into a single target data stream for the application of the specified smart city, and a large amount of manpower is not needed for carrying out cross-data-stream filtering and data aggregation, so that the labor cost is obviously reduced, and the popularization and the application are facilitated.
Drawings
FIG. 1 illustrates a system block diagram of the smart city data sharing system of the present invention;
fig. 2 shows a system block diagram of a smart city data sharing system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
It should be noted that, in the present invention, the "data producer" and the "data applicator" are respectively used to refer to data platforms of the internet of things that generate data and application data, and they may be mutually converted in different practical application situations.
As shown in fig. 1, the present invention provides a smart city data sharing system, which includes a cloud data service platform having a communication connection and a smart city subsystem. The intelligent city subsystem comprises an intelligent traffic system, an intelligent lighting system, an intelligent security system and an intelligent environment monitoring system. The smart city subsystem comprises an Internet of things device and an Internet of things data platform, and the Internet of things data platform comprises a data processing module and a data agent module.
And the data intermediary server in the cloud data service platform divides the related smart city subsystem into a data production party and a data application party according to the received data service request. The data mediation server receives metadata of available data streams sent by the data producers and data requirement information sent by the data application side, the data requirement information including a selection of individual data fields associated with the plurality of data streams, and then pairs the data application side with the data producer side that satisfies its requirements.
The data intermediary server generates a producer configuration and an application configuration and transmits the producer configuration and the application configuration to the corresponding Internet of things data platform; based on the identified pairing, the data producer and the data application party establish peer-to-peer connection, so that real-time data sharing between the smart city subsystems is realized, and the method comprises the following steps: the data mediation server responds to a data request of the data application party and enables a corresponding data production party to selectively send data fields to the data application party according to data demand information of the data application party, and the data application party assembles the data fields of a plurality of data streams received from the plurality of data production parties into a single target data stream for a specified smart city application.
Illustratively, applications of the intelligent traffic system include real-time traffic data distribution and road traffic guidance, applications of the intelligent lighting system include energy-saving management and lamp networking positioning, applications of the intelligent security system include remote monitoring and security information distribution, and applications of the intelligent environment monitoring system include pollutant monitoring and environment information distribution.
The invention avoids the large bandwidth requirement and resource waste caused by centralized storage in the prior art scheme, and ensures that the data sharing system has better expandability. In addition, the invention does not need a large amount of manpower to filter and aggregate data across data streams, thereby obviously reducing the labor cost and being more beneficial to popularization and application.
Example 1
Fig. 2 is a system block diagram of the smart city data sharing system of the embodiment, and it should be noted that, in order to express features of the technical solution of the embodiment concisely and clearly, the cloud data service platform and the smart city subsystem are omitted in the diagram, and the specific structural structures thereof are respectively adopted to describe the technical solution of the present invention.
In this embodiment, the data platforms of the internet of things located on the left side and the right side are data producers, and the data platforms of the internet of things located in the middle for receiving data streams are data consumers. For the convenience of understanding, this embodiment can be regarded as a schematic diagram of a data sharing system when executing a remote monitoring application of the smart security system, the middle data platform of the internet of things belongs to the smart security system, and the data platforms of the internet of things on the left side and the right side belong to the smart traffic system and the smart lighting system, respectively. It should be appreciated that a smart city data sharing system may generally include any number of internet of things data platforms, and each individual internet of things data platform may generally serve as a data producer or a data consumer. In addition, the number of the internet of things devices in the figure is usually a plurality, and only some internet of things devices are exemplarily shown for convenience of expression, so that the present invention should not be considered as being limited thereto.
In a smart city data sharing system, the plurality of internet of things devices connected to the internet of things data platform include, but are not limited to, audio-video devices, environmental sensors and monitoring devices (e.g., temperature sensors, pressure sensors, flow sensors and related alarm systems), and fixed or mobile computing devices. The data processing module in each internet of things data platform can process or analyze raw data received from the corresponding internet of things device. In addition, the data agent module in each data platform of the internet of things is used for communicating with the data intermediary server and exchanging data with other data platforms of the internet of things.
For the data platform of the internet of things serving as a data producer, the data agent module of the data platform sends metadata about available data streams to the data mediation server. The metadata may include data type, data rate, information about the internet of things devices that collected the data, including their location, manufacturer, model/serial number, and measurement accuracy. Similarly, for an internet of things data platform acting as a data application side, the data agent module transmits data requirement information to the data mediation server, wherein the data requirement information comprises selection of various data fields associated with a plurality of data streams, and further comprises data type, data rate, geographical location information and time information when data is collected.
After the data intermediate server receives the data service request and the data demand information sent by the data application party, the data application party and the data production party meeting the demand of the data application party are paired. Further, the data intermediary server generates a producer side configuration and an application side configuration, and transmits the producer side configuration and the application side configuration to the corresponding data platform of the internet of things.
A producer configuration is generated by the data broker server and sent to a data producer associated with the single data service, the producer configuration identifying the data application and specifying selected data fields of a data stream provided by the data producer.
An application-side configuration is generated by the data mediation server and sent to a data application side associated with the single data service, the application-side configuration identifying a data producer that streams data to the data application side and specifying a mapping policy when mapping the streamed data to a single target data stream.
In order to enable the designated data producer and the data application party to be connected and carry out data transmission, the data intermediary server generates a security token and sends the security token and the network address I of the data application party to the data producer, and a data agent module in the data producer establishes peer-to-peer connection with the data application party according to the security token and the network address I. Preferably, the security token is set to expire after a certain period of time and updated security tokens are periodically sent to the data application and data producer to re-establish the connection.
After establishing the peer-to-peer connection, the data producer filters the original data stream according to the producer configuration and sends the data fields selected in the data demand information to the data application party. A data application receives data streams from a plurality of data producers. Based on the application side configuration, the data agent module of the data application side combines the received data streams into a single target data stream for further use by the data platform of the internet of things.
The data intermediary server comprises a communication module, a user interface module, a configuration creator, a supply and demand information base and an industry profile base.
The supply and demand information base is used for storing metadata of available data streams and metadata of data streams required by the intelligent city subsystems.
The industry profile library is used for storing identification information of each smart city subsystem, such as information of the industry/organization, the geographic area, the organization scale, the type of the internet-of-things equipment operated in the industry/organization, and/or the type of the acquired data. It should be noted that although the supply and demand information repository and the customer simple repository are described separately, they may also be integrated into a single database, in which case they belong to different categories in the database.
The configuration creator is used to generate a producer side configuration and an application side configuration. The communication module is used for receiving a data service request, data demand information and metadata of an available data stream from the data platform of the Internet of things. In addition, the communication module may be further configured to send the security token, the producer configuration, the application configuration to the internet of things data platform, and provide a user interface for the internet of things data platform. The user interface module generates a user interface for presenting information to a platform user or requesting information.
The data platform of the internet of things comprises a data processing module and a data agent module, wherein the data agent module comprises a data filtering unit, a data field mapping unit, a data formatting unit and a communication unit.
The data processing module may condition, filter, aggregate, average, and/or resample the incoming raw data stream. Further, the data processing module may analyze and process the data, and when acting as a data producer, the raw data and/or the processed data may be passed to the data proxy module for transmission to other internet of things data platforms. Correspondingly, when acting as a data application side, data streams received by the data agent module from other data platforms of the internet of things can be forwarded to the data processing module for processing and analysis, or stored in a permanent memory of the data platform of the internet of things for future use.
And the communication unit in the data agent module is used for communicating with the data intermediary server and establishing peer-to-peer connection with other Internet of things data platforms.
When acting as a data producer, the data filtering unit may filter the original data stream based on the producer configuration, resulting in only selected data fields included in the data demand information.
When acting as a data application side, the data stream received via the communication unit is transferred to a data field mapping unit, which may aggregate data fields on multiple data streams according to the application side configuration to generate a single target data stream. The data formatting unit is used for performing unit conversion and data type conversion so as to convert the received data format into a format required by the target data stream. The data formatting unit is further adapted to correct the time, which is used to ensure that the point in time to which each data sample belongs is consistent.
Example 2
As an improvement and supplement to embodiment 1, the gateway of the internet of things data platform and the internet of things device connected thereto have an out-of-band communication system. And the gateway of the data platform of the Internet of things broadcasts an out-of-band wireless beacon which is communicated with the corresponding equipment of the Internet of things through a network gateway, wherein the out-of-band wireless beacon comprises a token. In operation, the gateway receives an encrypted packet, decrypts the encrypted packet into an intermediate payload using the public key, and then decrypts the intermediate payload into a decrypted packet using the token.
In particular, the out-of-band communication system may be an RF transmitter, and the aforementioned public key corresponds to a certificate in a plurality of internet of things devices. By adopting the technical scheme, the following conditions are met when the Internet of things equipment and the gateway of the Internet of things data platform carry out normal communication: 1. the Internet of things equipment is provided with an out-of-band communication system 2 and is positioned in the effective broadcast communication distance range of the gateway; 3. the internet of things device has a corresponding certificate.
Therefore, only when the 3 conditions are met, the Internet of things equipment can effectively communicate with the Internet of things data platform, and therefore the phenomenon that irrelevant network equipment attacks the Internet of things data platform or performs data interaction with the Internet of things data platform is effectively avoided. Because the existing Internet of things equipment is often insufficient in safety verification measures, the technical scheme greatly improves the network communication safety of the Internet of things data platform, and therefore the data safety and effectiveness of the whole smart city data sharing system are improved.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and all such changes or substitutions are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A smart city data system based on big data is characterized by comprising a cloud data service platform and a smart city subsystem which are in communication connection, wherein the smart city subsystem comprises an Internet of things device and an Internet of things data platform, the Internet of things data platform comprises a data processing module and a data agent module,
the gateway of the Internet of things data platform and the Internet of things equipment connected with the gateway are provided with an out-of-band communication system, the gateway of the Internet of things data platform communicates with the corresponding Internet of things equipment through a network broadcast gateway through an out-of-band wireless beacon, and the out-of-band wireless beacon comprises a token; during operation, the gateway receives the encrypted packet, decrypts the encrypted packet into an intermediate payload by using the public key, and then decrypts the intermediate payload into a decrypted packet by using the token;
the data mediation server in the cloud data service platform divides the related smart city subsystems into a data producer and a data applicator according to the received data service request, the data mediation server receives metadata of available data streams sent by the data producer and data demand information sent by the data applicator, and then pairs the data applicator with the data producer meeting the demand of the data applicator, the data demand information includes selection of each data field associated with a plurality of data streams,
the data intermediary server generates a producer configuration and an application configuration and transmits the producer configuration and the application configuration to the corresponding Internet of things data platform; the producer configuration is generated by the data broker server and sent to a data producer associated with the single data service, the producer configuration identifying the data application and specifying selected data fields of a data stream provided by the data producer;
the application-side configuration is generated by the data mediation server and sent to a data application-side associated with the single data service, the application-side configuration identifying a data producer that streams data to the data application-side and specifying a mapping policy when mapping the streamed data to a single target data stream;
the data mediation server responds to a data request of the data application party and enables a corresponding data production party to selectively send data fields to the data application party according to data demand information of the data application party, and the data application party assembles the data fields of the multiple data streams received from the data production party into a single target data stream for a specified smart city application.
2. The smart city data system according to claim 1, wherein the internet of things data platform includes a data processing module and a data agent module, the data agent module includes a communication unit and a data field mapping unit;
the data streams received via the communication unit are transmitted to a data field mapping unit, which aggregates data fields on multiple data streams according to an application side configuration to generate a single target data stream.
3. The smart city data system of claim 1 or 2, wherein the smart city subsystem comprises a smart traffic system, a smart lighting system, a smart security system, and a smart environmental monitoring system.
4. The smart city data system of claim 3, wherein applications of the smart traffic system include real-time traffic data distribution and road traffic guidance, applications of the smart lighting system include energy-saving management and lamp networking location, applications of the smart security system include remote monitoring and security information distribution, and applications of the smart environment monitoring system include pollutant monitoring and environmental information distribution.
5. The smart city data system of claim 4, wherein the metadata of the available data streams includes: the data type, the data rate and the information of the collected data of the Internet of things equipment, wherein the information of the Internet of things equipment comprises the geographic position, the manufacturer, the model, the serial number and the measurement precision;
the data requirement information further comprises: data type, data rate, and geographic location information and time information when the data was collected.
6. The smart city data system of claim 5, wherein the data mediation server generates a security token and sends it to the data producer together with the network address one of the data applicator, and the data agent module in the data producer establishes a peer-to-peer connection with the data applicator based on the security token and the network address.
7. The smart city data system of claim 6, wherein after establishing peer-to-peer connection, the data producer filters the raw data stream according to producer configuration and sends selected data fields in the data demand information to the data applicator;
the data application side receives data streams from the data production side, and then combines the received data streams into a single target data stream through the data agent module.
8. The smart city data system of claim 7, wherein the data mediation server includes a communication module, a user interface module, a configuration creator, a supply and demand information base, and an industry profile base, wherein,
the supply and demand information base is used for storing metadata of available data streams and metadata of data streams required by each smart city subsystem,
the industry profile library is used for storing identification information of each smart city subsystem,
the configuration creator is used for generating a producer side configuration and an application side configuration.
9. The smart city data system of claim 8, wherein the out-of-band communication system is an RF transmitter and the public keys correspond to certificates in a plurality of internet of things devices.
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| CN201911115138.5A CN110855783B (en) | 2018-08-11 | 2018-08-11 | Smart city data system based on big data |
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| CN201911115138.5A CN110855783B (en) | 2018-08-11 | 2018-08-11 | Smart city data system based on big data |
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| CN110611668A (en) * | 2019-09-09 | 2019-12-24 | 江西航天鄱湖云科技有限公司 | Freely-configurable Internet of things monitoring method and device, storage medium and equipment |
| CN110633297A (en) * | 2019-09-12 | 2019-12-31 | 苏州百宝箱科技有限公司 | Smart city data sharing system |
| CN111464657A (en) * | 2020-04-21 | 2020-07-28 | 阿拉拇 | Smart city data system based on big data |
| CN111553600B (en) * | 2020-04-29 | 2021-01-12 | 江西融合科技有限责任公司 | Big data-based smart city business distribution system |
| CN112232997A (en) * | 2020-04-29 | 2021-01-15 | 广元量知汇科技有限公司 | User request data processing method for smart city |
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